fix(Core/Chat): Prevent Horde / Alliance chat via custom emotes (#2292)

* add new worldserver parameter "AllowTwoSide.Interaction.Emote"
* use new broadcast text ID 91243 for strange gestures

data/sql/updates/pending_db_world/rev_1568889498159574820.sql

@@ -0,0 +1,12 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1568889498159574820');
+
+-- take over the translated texts from 16259, strip the "%s" at the beginning and create a new broadcast text ID 91243
+DELETE FROM `broadcast_text_locale` WHERE `ID` = 91243;
+INSERT INTO `broadcast_text_locale` (`ID`, `locale`, `MaleText`, `FemaleText`, `VerifiedBuild`)
+  SELECT 91243 AS `ID`, `locale`, TRIM(TRIM('%s' FROM `FemaleText`)) AS `MaleText`, TRIM(TRIM('%s' FROM `FemaleText`)) AS `FemaleText`, 0
+  FROM `broadcast_text_locale` WHERE `ID` = 16259;
+
+DELETE FROM `broadcast_text` WHERE `ID` = 91243;
+INSERT INTO `broadcast_text` (`ID`, `Language`, `MaleText`, `FemaleText`, `EmoteID0`, `EmoteID1`, `EmoteID2`, `EmoteDelay0`, `EmoteDelay1`, `EmoteDelay2`, `SoundId`, `Unk1`, `Unk2`, `VerifiedBuild`)
+VALUES
+(91243,0,'makes some strange gestures.','makes some strange gestures.',0,0,0,0,0,0,0,0,0,0);

src/server/game/Entities/Player/Player.cpp

@@ -20948,9 +20948,30 @@ void Player::TextEmote(const std::string& text)
     if (!sEluna->OnChat(this, CHAT_MSG_EMOTE, LANG_UNIVERSAL, _text))
         return;
 #endif
+
     WorldPacket data;
-    ChatHandler::BuildChatPacket(data, CHAT_MSG_EMOTE, LANG_UNIVERSAL, this, this, _text);
+    std::list<Player*> players;
-    SendMessageToSetInRange(&data, sWorld->getFloatConfig(CONFIG_LISTEN_RANGE_TEXTEMOTE), true, !sWorld->getBoolConfig(CONFIG_ALLOW_TWO_SIDE_INTERACTION_CHAT));
+    Trinity::AnyPlayerInObjectRangeCheck checker(this, sWorld->getFloatConfig(CONFIG_LISTEN_RANGE_TEXTEMOTE));
+    Trinity::PlayerListSearcher<Trinity::AnyPlayerInObjectRangeCheck> searcher(this, players, checker);
+    this->VisitNearbyWorldObject(sWorld->getFloatConfig(CONFIG_LISTEN_RANGE_TEXTEMOTE), searcher);
+
+    for (auto const& itr : players)
+    {
+        if (!sWorld->getBoolConfig(CONFIG_ALLOW_TWO_SIDE_INTERACTION_EMOTE) && this->GetTeamId() != itr->GetTeamId())
+        {
+            LocaleConstant loc_idx = itr->GetSession()->GetSessionDbLocaleIndex();
+            if (BroadcastText const* bct = sObjectMgr->GetBroadcastText(EMOTE_BROADCAST_TEXT_ID_STRANGE_GESTURES))
+            {
+                ChatHandler::BuildChatPacket(data, CHAT_MSG_EMOTE, LANG_UNIVERSAL, this, this, bct->GetText(loc_idx, this->getGender()));
+                itr->SendDirectMessage(&data);
+            }
+        }
+        else
+        {
+            ChatHandler::BuildChatPacket(data, CHAT_MSG_EMOTE, LANG_UNIVERSAL, this, this, _text);
+            itr->SendDirectMessage(&data);
+        }
+    }
 }
 
 void Player::Whisper(const std::string& text, uint32 language, uint64 receiver)

src/server/game/Entities/Player/Player.h

@@ -914,6 +914,11 @@ enum InstantFlightGossipAction
     GOSSIP_ACTION_TOGGLE_INSTANT_FLIGHT = 500
 };
 
+enum EmoteBroadcastTextID
+{
+    EMOTE_BROADCAST_TEXT_ID_STRANGE_GESTURES = 91243
+};
+
 class PlayerTaxi
 {
     public:

src/server/game/World/World.cpp

@@ -736,6 +736,7 @@ void World::LoadConfigSettings(bool reload)
     m_bool_configs[CONFIG_ALLOW_TWO_SIDE_WHO_LIST]            = sConfigMgr->GetBoolDefault("AllowTwoSide.WhoList", false);
     m_bool_configs[CONFIG_ALLOW_TWO_SIDE_ADD_FRIEND]          = sConfigMgr->GetBoolDefault("AllowTwoSide.AddFriend", false);
     m_bool_configs[CONFIG_ALLOW_TWO_SIDE_TRADE]               = sConfigMgr->GetBoolDefault("AllowTwoSide.trade", false);
+    m_bool_configs[CONFIG_ALLOW_TWO_SIDE_INTERACTION_EMOTE]   = sConfigMgr->GetBoolDefault("AllowTwoSide.Interaction.Emote", false);
    
     m_int_configs[CONFIG_MIN_PLAYER_NAME]                     = sConfigMgr->GetIntDefault ("MinPlayerName",  2);
     if (m_int_configs[CONFIG_MIN_PLAYER_NAME] < 1 || m_int_configs[CONFIG_MIN_PLAYER_NAME] > MAX_PLAYER_NAME)

src/server/game/World/World.h

@@ -170,6 +170,7 @@ enum WorldBoolConfigs
     CONFIG_CLOSE_IDLE_CONNECTIONS,
     CONFIG_LFG_LOCATION_ALL, // Player can join LFG anywhere
     CONFIG_PRELOAD_ALL_NON_INSTANCED_MAP_GRIDS,
+    CONFIG_ALLOW_TWO_SIDE_INTERACTION_EMOTE,
     BOOL_CONFIG_VALUE_COUNT
 };
 

src/server/worldserver/worldserver.conf.dist

@@ -1639,6 +1639,14 @@ AllowTwoSide.Interaction.Calendar = 0
 
 AllowTwoSide.Interaction.Chat = 0
 
+#
+#    AllowTwoSide.Interaction.Emote
+#        Description: Allow emote messages between factions (e.g. "/e looks into the sky")
+#        Default:     0 - (Disabled)
+#                     1 - (Enabled)
+
+AllowTwoSide.Interaction.Emote = 0
+
 #
 #    AllowTwoSide.Interaction.Channel
 #        Description: Allow channel chat between factions.